679957 has 2 divisors, whose sum is σ = 679958. Its totient is φ = 679956.

The previous prime is 679951. The next prime is 679961. The reversal of 679957 is 759976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 527076 + 152881 = 726^2 + 391^2 .

It is a cyclic number.

It is not a de Polignac number, because 679957 - 2⁷ = 679829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339978 + 339979.

It is an arithmetic number, because the mean of its divisors is an integer number (339979).

2⁶⁷⁹⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

679957 is a deficient number, since it is larger than the sum of its proper divisors (1).

679957 is an equidigital number, since it uses as much as digits as its factorization.

679957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 119070, while the sum is 43.

The square root of 679957 is about 824.5950521317. The cubic root of 679957 is about 87.9347398386.

The spelling of 679957 in words is "six hundred seventy-nine thousand, nine hundred fifty-seven".